Huge party typically full of teenagers and early 20 year old guys looking for a quick root. Best to go to these parties fully clothed unless you're looking at getting pregnant or paying child support for the rest of you life. Mass parties generally don't have honourable amounts of food just booze and weed. Best mass parties are hosted in halls and clubs with mean lighting set ups
Chad: " yo Harley did you hear there's a mass party on Saturday?!"

Harley: " yeah I did, ifts going to have all the bass drops and sickest lighting set ups, I heard there's going to be over 300 people!!"
by Freegan.Banana August 11, 2016
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An extremely nerdy euphemism for masturbation. Used mostly by engineering students.
Student #1: "Hey man what are your plans for tonight."
Student #2: "Nothing much. Just gonna study and then some quick Heat and Mass Transfer. Same as always."
by arachnidred August 11, 2011
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when a large group joins together to cause problems to another or a group of others with or with out comprehension of their own actions completely to get themselves killed and they are successful at it.
the majority of the citizens of the United States of America are attempting mass conspiratorial suicide.
by Kevinw05 August 23, 2022
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The mass pass is like the n-word pass but you can make jokes about fat people the mass pass can be given out by any chubby/fat person.
Dude: hey man can you give me the mass pass
Friend: no
by LordHeadAss445 January 6, 2020
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When people are being stupid in a group. Collective retardation.
The teacher explained mass defect for the class by showing them a video of cheering Trump supporters.

Dr. Goldberg: Don't forget the mass defect in your equation Doctor Johnson.
Dr. Johnson: Oh, so m=13.267ev-#YOLO+#KillAllWhiteMen then?
by SimTeXa August 10, 2016
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a person who murders alot of moose's.
Oh my god there's that mass-mooserar, he should have never been let out of jail WELL I NEVER!
by Amalia Carroll May 29, 2008
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